Police released this image captured on a security camera video from Irving convenience store on South Main Street in Rutland of a suspect standing at the counter as he robbed the store at knifepoint Saturday night.

Rutland City Police are investigating another knifepoint robbery of a convenience store.

According to police, shortly after 10 p.m. Saturday, a man wielding a hunting knife entered the Irving convenience store on South Main Street and demanded money.

Police described the suspect as a male in his late teens or early 20s, approximately 5 feet, 7 inches tall and weighing between 125 pounds and 135 pounds. He was wearing a blue hooded sweatshirt with some sort of emblem and a gray scarf or mask covering his face.

Saturday’s incident was the third convenience store robbery in eight days and the fourth knifepoint robbery in the city since the start of the new year.

Shortly after 8 p.m. Jan. 1, a man used a knife to rob a Domino’s Pizza delivery driver who was bringing food to a Williams Street business. Then, there were a pair of robberies during a 24-hour period last weekend.

According to police, shortly before 9 p.m. Jan. 4, a man wielding a knife entered the Mobil gas station on West Street near Ripley Road and demanded money. With money in hand, the man fled the store on foot.

Police described the suspect as a white male, 5 feet, 6 inches tall, and weighing approximately 150 pounds.

Then, at approximately 6 p.m. Jan. 5, a man entered the Mac’s Convenience Store on North Main Street and demanded cash. Police described the suspect as a male, approximately 5 feet, 7 inches tall, with a skinny build, wearing blue jeans, a hooded sweatshirt and something covering his face.

That incident was the second at that location in less than two weeks. Shortly before 8 p.m. Dec. 22, a man wearing a bandana on his face entered Mac’s with a knife and demanded money. Police said the man fled the store after the clerk refused to comply.

Anyone with information about the robberies is asked to call Rutland City Police at 773-1816.